/Engine/Source/Editor/BlueprintGraph/Public/BlueprintActionDatabaseRegistrar.h
Special case for asset bound actions (we want to clean-up/refresh these when the corresponding asset is updated). AssetOwner must be an asset!
bool AddBlueprintAction ( [UObject](API\Runtime\CoreUObject\UObject\UObject) const * AssetOwner, [UBlueprintNodeSpawner](API\Editor\BlueprintGraph\UBlueprintNodeSpawner) * NodeSpawner )